fix #113243.

src/vs/workbench/contrib/notebook/browser/view/renderers/codeCell.ts

@@ -231,6 +231,7 @@ export class CodeCell extends Disposable {
 				if (this._activeCellRunPlaceholder === null) {
 					// const keybinding = this._keybindingService.lookupKeybinding(EXECUTE_CELL_COMMAND_ID);
 					this._activeCellRunPlaceholder = this.notebookCellStatusBarService.addEntry(getExecuteCellPlaceholder(this.viewCell));
+					this._register(this._activeCellRunPlaceholder);
 				}
 
 				return;

src/vs/workbench/contrib/notebook/browser/view/renderers/markdownCell.ts

@@ -144,6 +144,7 @@ export class StatefulMarkdownCell extends Disposable {
 				if (this._activeCellRunPlaceholder === null) {
 					// const keybinding = this._keybindingService.lookupKeybinding(EXECUTE_CELL_COMMAND_ID);
 					this._activeCellRunPlaceholder = this.notebookCellStatusBarService.addEntry(getExecuteCellPlaceholder(this.viewCell));
+					this._register(this._activeCellRunPlaceholder);
 				}
 
 				return;